Secret Color Are Made Of An All New Keratin-Conditioned Fiber That Moves, Feels And Looks Like The Real Thing! The Real Secret Is The Unique, Adjustable, Invisible Headband That You Wear Like Any Other, Then Pull Your Own Hair Over. It Fits Any Head Without Bumps Or Ridges Showing So You Can Thicker, Fuller, Longer Hair In Seconds In Any Combination Of Four Stunning Colours.